Datalogic [india] manufactures sensors with laser emission concentrated in a thin laser beam, series sl5 which are ideal for detection of very small objects or to reach very long operating distances. Precise detections with decimillimetre resolutions can be obtained with the proximity model. These sensors can reach high operating distances with polarised retro reflex model or through beam model and also can effect high resolution detections at shorter distances. The visible red emission is generated by class i laser according to the en 60825 1which guarantees maximum safety in all applications. The sensors are equipped with sensitivity adjustment trimmer and leds which indicate the output status and switching stability positioned on the sturdy abs tubular m18 housing with ip67 protection.